Gripper Weaving Machine Movement Parameter Determination
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Solution Overview
Problem
Existing gripper weaving machines face challenges in accurately determining movement parameters such as movement stroke, speed, and acceleration, which limit weaving speed due to the complexity of transmission mechanisms and phase shifts between gripper movements and drive shaft rotations.
Innovation Solution
A method and device that determine the movement parameter of a gripper by capturing angular positions of a drive element when a transmission part moves over a defined range, allowing for the calculation of oscillation amplitude and transmission ratio independently of phase shifts, using markers and sensors to measure angular changes, and storing geometric parameters for different amplitudes and strokes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transmission mechanisms with adjustable amplitude are used to control gripper movement, then the movement stroke can be adjusted, but the determination of movement parameters becomes inaccurate due to phase shifts between gripper movements and drive shaft rotations
Solution Approach 1:
The patent uses sensors to detect the angular position of the drive element and provides feedback to a control unit. The control unit calculates the amplitude of oscillation based on this feedback, continuously monitoring and adjusting for phase shifts between the drive shaft rotation and gripper movement, thereby maintaining measurement precision despite adjustable stroke settings
Solution Approach 2:
The patent replaces direct mechanical measurement methods with an electronic sensing and calculation system. Instead of relying on mechanical linkages to directly indicate movement parameters, the system uses angular position sensors and computational algorithms to determine movement parameters, eliminating the accuracy issues caused by mechanical phase shifts
2Adaptability or versatility
If complex transmission mechanisms are used to enable adjustable amplitude oscillation, then gripper movement control is achieved, but the weaving speed is limited due to the complexity
Solution Approach 1:
The patent changes the approach from mechanically adjusting transmission parameters to electronically controlling movement parameters. By using sensors to detect angular position and computationally determining movement characteristics, the system can rapidly adjust amplitude and stroke without the mechanical complexity that limits speed, enabling faster response and higher weaving speeds
3Measurement precision
If markers and sensors are added to measure angular positions, then movement parameter determination becomes accurate, but device complexity increases
Solution Approach 1:
The patent extracts only the essential measurement function needed - detecting angular position of the drive element. By focusing on this single critical parameter and using it to calculate all other movement parameters mathematically, the system achieves high measurement precision with minimal sensors and markers, avoiding unnecessary complexity
Data Source
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AI summary
The invention relates to a method and a device for determining a movement parameter of a gripper (3, 5) in a gripper weaving machine, wherein the gripper (3, 5) can be driven to move back and forth using a transmission part (31, 32), wherein a drive element (12, 26) rotating with a drive shaft (7) of the gripper weaving machine is drivingly coupled via a transmission mechanism (24, 25) to the transmission part (31, 32), wherein the transmission part (31, 32) can be driven by the drive element (12, 26) to oscillate between extreme transmission part positions, wherein an amplitude of an oscillation of the transmission part (31, 32) is adjustable by setting the transmission mechanism (24, 25), and wherein the method comprises the steps of determining a change in an angular position of the drive element (12, 26) when moving the transmission part (31, 32) over a defined range (Δα), and determining the amplitude of the oscillation of the transmission part (31, 32) based on the determined change in the angular position (Δ Θ1, Δ Θ2) of the drive element (12, 26).